Larch Plugin Tutorial

EXAFS

Extended X-ray-Absorption Fine-Structure

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Group

A generic container for holding the symbols of functions, constants, and data. This is implemented as a python class.

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MBACK

A method to normalize X-ray absorption data to tabulated mass absorption coefficients conceived by T.-C. Weng, G. S. Waldo and J. E. Penner-Hahn and published in Journal of Synchrotron Radiation (2005). 12, 506-510, DOI: 10.1107/S0909049504034193

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XANES

X-ray-Absorption Near-Edge Structure

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XAS

X-ray-Absorption Spectroscopy

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diffKK

Differential Kramers-Kronig transform, an algorithm for invoking the causality relationship to relate the real part of the energy-dependent, complex correction to the Thompson scattering (f1(E)) to the imaginary part (f2(E)), which is obtained from a measurement of the XAS mu(E).

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symbol

A word used by Larch to point to a Group, function, constant, or piece of data. This is a word with special meaning at the Larch command line. The collection of symbols recognized by Larch is called the "symbol table".

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vectorization

The conversion of a scalar calculation -- processing a single pair of operands at a time -- to a vector implementation -- processing one operation on many pairs of operands at once. This allows you to optimize algorithms by using the architecture of your computer hardware along with highly optimised vector routines, in this case supplied by NumPy.

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